Pre-eutectic densification in MgF/sub 2/-CaF/sub 2/

Conference · Thu Apr 01 04:00:00 EST 1982

OSTI ID:5133972

Hu, S C; De Jonghe, L C

Increased densification rates were found as much as 200/sup 0/C below the eutectic temperature (980/sup 0/C) for MgF/sub 2/ containing small amounts of CaF/sub 2/. Constant heating rate and constant temperature sintering data, as well as microstructural developments indicated that solid state grain-boundary transport rates had been enhanced by the eutectic forming additive. The effect saturated at about 1 wt % CaF/sub 2/. The results suggest that densification of ceramic powders could be favorably affected without a substantial increase in the grain growth rate, by the addition of small amounts of eutectic forming additives, and sintering below the eutectic temperature. 6 figures.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5133972
• Report Number(s): LBL-12849-Rev.; CONF-820638-2-Rev.; ON: DE82015750
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
CRYSTAL STRUCTURE
DATA
EUTECTICS
EXPERIMENTAL DATA
FABRICATION
FLUORIDES
FLUORINE COMPOUNDS
GRAIN GROWTH
GRAIN SIZE
HALIDES
HALOGEN COMPOUNDS
INFORMATION
MAGNESIUM COMPOUNDS
MAGNESIUM FLUORIDES
MICROSTRUCTURE
NUMERICAL DATA
POWDERS
SHRINKAGE
SINTERING
SIZE